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Патент USA US2123923

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July 19, 1938.
' i ’ _
E. P. ALsTl-:D
2,123,923
JOIST
Original Filed March 2l, 1929
14
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2,123,923
Patented July 19, 1938
UNITED STATES
PATENT OFFICE
2,123,923
JOIST
Edward P. Alsted, Truesdell, Wis.
v Refiled
for
abandoned application Serial _No.
348,825, March 21, 1929. This application Octo
bei' 18, 1937. Serial No. 169,659
6 Claims. (Cl. 'l2-60)
My invention has relation to improvements in
joists.
An important object of my invention is the
provision of an improved form of joist of U
¿shape in cross-section, upon which the ñooring
or other device to be supported is placed, said U
shaped formation providing a pocket or recep
tacle for a filling extending downwardly from the
under side of the ñoor or device to be supported,
iol land which filling, of course, strengthens the joist,
and assists said joist in performing its supporting
function.
Another important object of the invention is
to provide a construction which performs the
¿double function of serving both as a floor joist and
a ceiling joist.
A still further object is the provision of a U
shaped joist provided on opposite sides thereof
with laterally-extending flanges adapted to form
shelves for supporting timbers disposed beneath
the flooring.
.
With the above objects, and other incidental
Objects, in view, which will be made clear from
the description which follows, the invention con
25 sists of the devices and parts, or the equivalents
thereof, as herein set forth.
30
8, in turn, support longitudinally extending tim
bers 9. .
In the accompanying drawing, Fig. l is a cross
sectional view through two of the joists, and
showing the application of the joists as supports
for a monolithic concrete flooring;
Fig. 2 is a side elevation of one of the sides of
the joists, parts being broken away;
Fig. 3 is a bottom view of a fragment of one
of the joists, broken away at the center; and
Fig. 4 is a cross-sectional view through the joist
35
and related parts, showing a modified form of the
jOist.
Referring to the drawing, the numeral 5 indi
cates the improved metallic joist, two of the same
40 being shown. It is obvious that as many of these
joists are provided as are necessary to properly
support the particular flooring to which they are
applied. Each of these joists is of elongated U
shaped formation.
It is desirable, although not absolutely neces
sary, to provide each joist on opposite sides there
of with supporting flanges. These flanges are
preferably formed by cutting out the metal, as
indicated by the numeral 6, the cuts being posi
50 tioned a desired distance apart throughout the
length of the side pieces of the joists. The lips
formed by the cut out portions are bent down
wardly and outwardly to provide flanges l. The
opposed flanges of a pair of the joists support
wooden
cross-timbers 8, and these cross-timbers
55
It will be observed that the bottom of each U
shaped joist is formed at desired distances apart
with openings I0, for a purpose hereinafter to be
referred to.
Located in the bottom of each joist is a wooden
beam II.
Below the joists is shown a ceiling strip I2.
By forming the openings I0 in the bottom of
each U-shaped joist, provision is made for the
passage of nails I3 for uniting the ceiling strip
I2 to the beam II.
'
The monolithic concrete flooring is indicated ,
by the numeral I4. Some of the concrete neces
sarily enters the U-shaped joists, as indicated by
the numeral i5, and ñlls the space of said joists
above the wooden beam Il. Therefore, it will be
evident that in cases where the joists are used as
supports for a concrete flooring, as disclosed in 20
the drawing, it is requisite that the beam II be
placed within the lower portion of the _joist to
receive the nails I3. If the concrete extended
clear to the bottom of the joists it would be
difñcult, if not impossible, to drive said nails into 25
the concrete.
While the concrete is setting and hardening, it
is supported by the timbers 8 and 9. After (the
hardening process has been completed, the tim
bers 8 can be knocked out and removed, and this 30
will of course also permit of the removal of the
timbers 9, whereby said timbers can be saved or
salvaged. The flanges l, therefore, make it pos
sible for this desirable function to be carried out,
i. e, the supporting of the timbers, which latter, 35
in turn, temporarily support the concrete flooring
during the time the latter is hardening. However,
it is obvious that the flanges 'I might be dispensed
with under certain circumstances, especially if the
joists are used for supporting a wooden flooring. 40
In this latter application of the invention, the
space within the joist is filled with a woodenV beam,
which at its upper end supports the wooden floor
ing, and the lower end of this beam receives
the -nails I3, which are driven through the ceil 45
ing timber I2 and through the opening I0, finally
entering the lower end of the wooden beam.
In the Fig. 1 construction, in order to permit of
the ready insertion of the wooden beam Il into
the space of the joists, it is necessary to round 50
the lower corners of said beam. Fig. 4 of the joist
shows a modification wherein the bottom of the
joist is flat only at its central portion, in which
central portion the opening I0 is formed. On op
posite sides of the ñat central portion the bottom 55
2 .
2,123,923
is provided with downwardly extending rounded
, projections Iii-I6 which permit the lower corner
edges of the beam Il to be made square instead
of rounded.
From the foregoing description it will be seen
that the U-shaped formation` of the joist provides
a pocket or receptacle for a i‘llling extending
downwardly from the under side of the iioor or
supported. device, and which’ filling of course
10 strengthens the joist, and assists said joist in
performing its supporting function.
Also froml the foregoing description, it will be
obvious that I provide a construction of joists
which is not only capable of forming a support
15 for the flooring of a room, but furthermore the
U-shaped formation thereof permits of openings,
such as I0, being formed in the bottom of the
joist, which enables the joist to serve also as a
means for the connection of a ceiling timber,
20 through the medium of the nails I3 passing
through said timber and through the opening I0
and entering the beam, which is supported in the
bottom of the joist.
It will furthermore be seen that by the provi
sion of the laterally extending flanges another
important function is accomplished by my im
proved construction, i. e., the said flanges serve
to temporarily support timbers, which latter in
turn support a concrete flooring during the time
said iiooring is setting and hardening.
This case is a substitution for application No.
348,825, ñled March 21, 1929.
What I claim as` my invention is:
1. As a new article of manufacture, a joist rec
tangular and substantially U-shaped in cross
section to provide side pieces and a bottom piece,
the side pieces provided with flanges extending
laterally outwardly at intermediate points of said
side pieces to form supporting ledges outwardly
40Lìbeyond the sides of the joists and below the upper
portion thereof.
2. As a new article of manufacture, a joist of
U-shaped, elongated form having a bottom piece
and straight side pieces extending at substantially
right angles upwardly from said bottom piece, the
side pieces being cut out at a plurality of inter
mediate points, the lips formed by said cut out
portions being bent outwardly and downwardly to
form laterally extending ñanges.
3. The combination of joists, each of elongated,
U-shaped form, to provide side pieces and a bot
tom piece, the said bottom piece provided with
spaced apart openings, a iiooring supported by 10
the joists, a beam resting on the bottom of each
joist, a ceiling strip or timber, and nails extending
through the ceiling strip, through the openings
in the bottoms of the joists and entering the
beam.
15
4. 'I‘he combination of joists, each of elongated
U-shaped form, to provide side pieces and a bot
tom piece, the bottom piece provided with spaced
apart openings, a beam resting on the bottom
of 4each joist, a ceiling strip or timber, nails ex 20
tending through the. ceiling strip and through
the openings in` the bottom of the joist and enter
ing the beam, and a concrete iiooring extending
over the joists, and having portions thereof enter-A
ing the joists and filling the spaces thereof above 25
the beams seated in the bottom of the joists.
5. The combination of joists, each of elongated
form having openings `in the bottom thereof, a
flooring supported by the joists, a. beam carried
by the joists over the openings in the bottom 80
thereof, a ceiling strip, and fastening means ex
tending from the ceiling strip through the open
ings in the bottom of the joists to said beam.
6. The combination of joists, each of elongated
form, having openings therein and flooring sup~ 35
ported by the joists, a beam positioned adjacentv
one side of the joists adjacent the openings there
in, another section of material positioned on the
other side of the joists, and fastening means ex
tending from said last mentioned section of ma.
terial through the openings in the joists to the
said beam.
‘
EDWARD P. AISTED.
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